878
FNCA52 TJSJ 050730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST WED AUG 5 2026
DISCUSSION
CRITICALLY FUELS CONTINUE ACROSS THE ISLANDS, PARTICULARLY ACROSS
THE SOUTHERN PORTIONS OF PUERTO RICO AND ST. CROIX IN THE U.S.
VIRGIN ISLANDS. HOWEVER, PERIODS OF SHOWERS ASSOCIATED WITH
SURFACE DISTURBANCE WILL CONTINUE TO INCREASE MOISTURE ACROSS THE
AREA AND WINDS WILL REMAIN BELOW 18 MPH TODAY. REGARDLESS, LOW
FIRE WEATHER RISK IS ANTICIPATED TODAY.
FROM LATE WEDNESDAY INTO THE END OF THE WORKWEEK, STABLE WEATHER
PATTERN AND STRENGTHENING WINDS ARE LIKELY IN THE NEXT FEW DAYS,
AND COMBINED WITH VERY DRY FUELS, THE FIRE DANGER WILL LIKELY
INCREASE. RESIDENTS AND VISITORS ARE ENCOURAGED TO CONTINUE TO
MONITOR THE FIRE WEATHER CONDITIONS AND AVOID OUTDOOR BURNING.
PRZ014-052000-
SOUTHEAST COASTAL PLAINS-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 10
TEMP (24H TREND) 91 (+1) 74 (-1) 93
RH % (24H TREND) 48 (-8) 91 (+2) 44
WIND 20FT/EARLY(MPH) E 14 E 12 E 16
WIND 20FT/LATE(MPH) SE 16 E 10 SE 16
MIXING HGT(FT-AGL/MSL)5270 5210
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 68510 67730
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-052000-
SOUTHERN HILLS-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 10
TEMP (24H TREND) 89 (+3) 70 (-3) 90
RH % (24H TREND) 60 (-9) 98 (+2) 55
WIND 20FT/EARLY(MPH) E 10 E 11 E 12
WIND 20FT/LATE(MPH) SE 12 E 11 SE 12
MIXING HGT(FT-AGL/MSL)5800 5870
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 69600 70440
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-052000-
NORTH COASTAL PLAINS-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 92 (+4) 73 (-3) 94
RH % (24H TREND) 59 (-13) 100 (+4) 54
WIND 20FT/EARLY(MPH) E 11 E 13 E 12
WIND 20FT/LATE(MPH) E 18 SE 11 E 19
MIXING HGT(FT-AGL/MSL)5360 5300
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 69680 68900
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-052000-
NORTHERN HILLS-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 40
TEMP (24H TREND) 89 (+2) 70 (-3) 92
RH % (24H TREND) 65 (-8) 100 (0) 59
WIND 20FT/EARLY(MPH) E 10 E 11 E 11
WIND 20FT/LATE(MPH) E 14 SE 8 E 16
MIXING HGT(FT-AGL/MSL)5810 5860
TRANSPORT WND (MPH) E 12 E 10
VENT RATE (KT-FT) 58100 52740
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-052000-
WEST COAST-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 30
TEMP (24H TREND) 93 (+2) 72 (-2) 94
RH % (24H TREND) 61 (-7) 99 (0) 57
WIND 20FT/EARLY(MPH) E 11 E 13 E 12
WIND 20FT/LATE(MPH) E 12 E 13 E 13
MIXING HGT(FT-AGL/MSL)5040 4860
TRANSPORT WND (MPH) SE 9 E 12
VENT RATE (KT-FT) 40320 48600
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-052000-
EASTERN INTERIOR-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 20
TEMP (24H TREND) 91 (+4) 72 (-3) 93
RH % (24H TREND) 57 (-11) 100 (+5) 53
WIND 20FT/EARLY(MPH) E 11 E 12 E 12
WIND 20FT/LATE(MPH) SE 13 E 13 E 13
MIXING HGT(FT-AGL/MSL)6710 6840
TRANSPORT WND (MPH) SE 14 SE 14
VENT RATE (KT-FT) 80520 82080
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-052000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 86 (+4) 70 (-2) 87
RH % (24H TREND) 64 (-13) 100 (+3) 60
WIND 20FT/EARLY(MPH) SE 9 E 10 E 11
WIND 20FT/LATE(MPH) SE 11 E 11 E 11
MIXING HGT(FT-AGL/MSL)4650 4830
TRANSPORT WND (MPH) SE 14 E 14
VENT RATE (KT-FT) 55800 57960
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-052000-
CENTRAL MOUNTAIN RANGE-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 40
TEMP (24H TREND) 86 (+3) 67 (-3) 89
RH % (24H TREND) 69 (-8) 100 (+1) 62
WIND 20FT/EARLY(MPH) E 8 SE 6 E 9
WIND 20FT/LATE(MPH) SE 9 E 6 E 10
MIXING HGT(FT-AGL/MSL)6400 7220
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 57600 57760
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-052000-
CAYEY MOUNTAIN RANGE-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 20
TEMP (24H TREND) 85 (+2) 69 (-3) 87
RH % (24H TREND) 64 (-8) 100 (+1) 62
WIND 20FT/EARLY(MPH) E 9 E 9 E 11
WIND 20FT/LATE(MPH) SE 11 E 10 E 11
MIXING HGT(FT-AGL/MSL)5660 5710
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 67920 68520
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-052000-
VIEQUES-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 20
TEMP (24H TREND) 91 (+3) 78 (-1) 92
RH % (24H TREND) 54 (-11) 85 (+1) 52
WIND 20FT/EARLY(MPH) E 12 E 16 E 13
WIND 20FT/LATE(MPH) SE 12 E 16 E 13
MIXING HGT(FT-AGL/MSL)3270 3490
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 45780 52350
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-052000-
CULEBRA-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 92 (+4) 79 (-1) 93
RH % (24H TREND) 57 (-13) 89 (+3) 55
WIND 20FT/EARLY(MPH) E 12 E 16 E 14
WIND 20FT/LATE(MPH) E 12 E 17 E 13
MIXING HGT(FT-AGL/MSL)3300 3500
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 46200 52500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-052000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 20 10
TEMP (24H TREND) 93 (+3) 74 (-1) 94
RH % (24H TREND) 50 (-9) 96 (+3) 48
WIND 20FT/EARLY(MPH) E 16 E 18 E 17
WIND 20FT/LATE(MPH) SE 17 E 18 SE 19
MIXING HGT(FT-AGL/MSL)5000 4910
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 75000 78560
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-052000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 20
TEMP (24H TREND) 90 (+4) 78 (-2) 91
RH % (24H TREND) 57 (-12) 89 (+4) 56
WIND 20FT/EARLY(MPH) E 13 E 17 E 14
WIND 20FT/LATE(MPH) E 13 E 17 E 13
MIXING HGT(FT-AGL/MSL)3320 3380
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 49800 54080
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-052000-
ST CROIX-
330 AM AST WED AUG 5 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20
TEMP (24H TREND) 90 (+3) 78 (-2) 92
RH % (24H TREND) 59 (-10) 89 (+2) 57
WIND 20FT/EARLY(MPH) E 12 E 14 E 14
WIND 20FT/LATE(MPH) SE 12 E 14 E 13
MIXING HGT(FT-AGL/MSL)4950 4760
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 69300 61880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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